mirror of
https://github.com/walles/moar.git
synced 2024-07-14 15:20:29 +03:00
76 lines
1.8 KiB
Plaintext
76 lines
1.8 KiB
Plaintext
1 #!/usr/bin/ruby
|
|
2
|
|
3 require "curses"
|
|
4
|
|
5 class Moar
|
|
6 include Curses
|
|
7
|
|
8 def initialize(file)
|
|
9 @first_line = 0
|
|
10 @file = file
|
|
11 @lines = IO.readlines(file)
|
|
12 @last_key = 0
|
|
13 end
|
|
14
|
|
15 def draw_screen()
|
|
16 # @first_line must not be closer than lines-2 from the end
|
|
17 max_first_line = @lines.size - (lines - 1)
|
|
18 @first_line = [@first_line, max_first_line].min()
|
|
19
|
|
20 # @first_line cannot be negative
|
|
21 @first_line = [0, @first_line].max()
|
|
22
|
|
23 clear()
|
|
24 setpos(0, 0)
|
|
25
|
|
26 attrset(A_NORMAL)
|
|
27 last_line = @first_line + lines - 2
|
|
28 for line_number in @first_line..last_line do
|
|
29 if line_number < @lines.size
|
|
30 addstr(@lines[line_number])
|
|
31 else
|
|
32 addstr("~\n")
|
|
33 end
|
|
34 end
|
|
35
|
|
36 attrset(A_REVERSE)
|
|
37 status = "Lines #{@first_line + 1}-"
|
|
38 status += "#{[@lines.size, last_line].min()}"
|
|
39 status += "/#{@lines.size}"
|
|
40 addstr(status)
|
|
41
|
|
42 refresh()
|
|
43 end
|
|
44
|
|
45 def run
|
|
46 init_screen
|
|
47 noecho
|
|
48 stdscr.keypad(true)
|
|
49
|
|
50 begin
|
|
51 crmode
|
|
52 while true
|
|
53 draw_screen()
|
|
54
|
|
55 key = getch()
|
|
56 case key
|
|
57 when ?q.ord
|
|
58 break
|
|
59 when Key::RESIZE
|
|
60 draw_screen()
|
|
61 when Key::DOWN
|
|
62 @first_line += 1
|
|
63 when Key::UP
|
|
64 @first_line -= 1
|
|
65 end
|
|
66
|
|
67 @last_key = key
|
|
68 end
|
|
69 ensure
|
|
70 close_screen
|
|
71 end
|
|
72 end
|
|
73 end
|
|
74
|
|
75 Moar.new(ARGV[0]).run()
|